"Neither is tinctumutation the result of the direct influence of light."
The Popular Science Monthly; 1895.

X-Bonus

If you are neutral in situations of injustice, you have chosen the side of
the oppressor. If an elephant has its foot on the tail of a mouse and you
say that you are neutral, the mouse will not appreciate your neutrality.
-Desmond Tutu, clergyman (b. 1931)